1 files changed, 89 insertions, 0 deletions
diff --git a/vendor/rustix/src/thread/setns.rs b/vendor/rustix/src/thread/setns.rs
new file mode 100644
index 000000000..0a5564ae1
--- /dev/null
+++ b/vendor/rustix/src/thread/setns.rs
@@ -0,0 +1,89 @@
+#![allow(unsafe_code)]
+
+use bitflags::bitflags;
+use linux_raw_sys::general::{
+    CLONE_NEWCGROUP, CLONE_NEWIPC, CLONE_NEWNET, CLONE_NEWNS, CLONE_NEWPID, CLONE_NEWTIME,
+    CLONE_NEWUSER, CLONE_NEWUTS,
+};
+
+use crate::backend::c::c_int;
+use crate::backend::thread::syscalls;
+use crate::fd::BorrowedFd;
+use crate::io;
+
+bitflags! {
+    /// Thread name space type.
+    pub struct ThreadNameSpaceType: u32 {
+        /// Time name space.
+        const TIME = CLONE_NEWTIME;
+        /// Mount name space.
+        const MOUNT = CLONE_NEWNS;
+        /// Control group (CGroup) name space.
+        const CONTROL_GROUP = CLONE_NEWCGROUP;
+        /// `Host name` and `NIS domain name` (UTS) name space.
+        const HOST_NAME_AND_NIS_DOMAIN_NAME = CLONE_NEWUTS;
+        /// Inter-process communication (IPC) name space.
+        const INTER_PROCESS_COMMUNICATION = CLONE_NEWIPC;
+        /// User name space.
+        const USER = CLONE_NEWUSER;
+        /// Process ID name space.
+        const PROCESS_ID = CLONE_NEWPID;
+        /// Network name space.
+        const NETWORK = CLONE_NEWNET;
+    }
+}
+
+/// Type of name space referred to by a link.
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+#[repr(u32)]
+pub enum LinkNameSpaceType {
+    /// Time name space.
+    Time = CLONE_NEWTIME,
+    /// Mount name space.
+    Mount = CLONE_NEWNS,
+    /// Control group (CGroup) name space.
+    ControlGroup = CLONE_NEWCGROUP,
+    /// `Host name` and `NIS domain name` (UTS) name space.
+    HostNameAndNISDomainName = CLONE_NEWUTS,
+    /// Inter-process communication (IPC) name space.
+    InterProcessCommunication = CLONE_NEWIPC,
+    /// User name space.
+    User = CLONE_NEWUSER,
+    /// Process ID name space.
+    ProcessID = CLONE_NEWPID,
+    /// Network name space.
+    Network = CLONE_NEWNET,
+}
+
+/// Reassociate the calling thread with the namespace associated with link referred to by `fd`.
+///
+/// `fd` must refer to one of the magic links in a `/proc/[pid]/ns/` directory, or a bind mount
+/// to such a link.
+///
+/// # References
+/// - [`setns`]
+///
+/// [`setns`]: https://man7.org/linux/man-pages/man2/setns.2.html
+pub fn move_into_link_name_space(
+    fd: BorrowedFd,
+    allowed_type: Option<LinkNameSpaceType>,
+) -> io::Result<()> {
+    let allowed_type = allowed_type.map_or(0, |t| t as c_int);
+    syscalls::setns(fd, allowed_type).map(|_r| ())
+}
+
+/// Atomically move the calling thread into one or more of the same namespaces as the thread
+/// referred to by `fd`.
+///
+/// `fd` must refer to a thread ID. See: `pidfd_open` and `clone`.
+///
+/// # References
+/// - [`setns`]
+///
+/// [`setns`]: https://man7.org/linux/man-pages/man2/setns.2.html
+pub fn move_into_thread_name_spaces(
+    fd: BorrowedFd,
+    allowed_types: ThreadNameSpaceType,
+) -> io::Result<()> {
+    syscalls::setns(fd, allowed_types.bits() as c_int).map(|_r| ())
+}